Olympics organisers have warned businesses that during London 2012 their advertising should not include a list of banned words, including “gold”, “silver” and “bronze”, “summer”, “sponsors” and “London”.

Publicans have been advised that blackboards advertising live TV coverage must not refer to beer brands or brewers without an Olympics deal, while caterers and restaurateurs have been told not to advertise dishes that could be construed as having an association with the event.

At the 40 Olympics venues, 800 retailers have been banned from serving chips to avoid infringing fast-food rights secured by McDonald’s.